cvs update
missing va_start in packet_disconnect
fix uninitialised variable warnings found by clang/llvm-3,3
fix all -Wsigned-pointer warnings reported by clang/llvm-3.3
this turned out bigger than I expected, after I changed channel ids to be
unsigned...
restore backwards search behaviour for tun_open()
fix if w/empty statement
enforce KERBEROS5 for lib/Makefile, too